1/*
2 * Copyright 2012-16 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26#include <linux/slab.h>
27
28#include "dce_clk_mgr.h"
29
30#include "reg_helper.h"
31#include "dmcu.h"
32#include "core_types.h"
33#include "dal_asic_id.h"
34
35#define TO_DCE_CLK_MGR(clocks)\
36 container_of(clocks, struct dce_clk_mgr, base)
37
38#define REG(reg) \
39 (clk_mgr_dce->regs->reg)
40
41#undef FN
42#define FN(reg_name, field_name) \
43 clk_mgr_dce->clk_mgr_shift->field_name, clk_mgr_dce->clk_mgr_mask->field_name
44
45#define CTX \
46 clk_mgr_dce->base.ctx
47#define DC_LOGGER \
48 clk_mgr->ctx->logger
49
50/* Max clock values for each state indexed by "enum clocks_state": */
51static const struct state_dependent_clocks dce80_max_clks_by_state[] = {
52/* ClocksStateInvalid - should not be used */
53{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
54/* ClocksStateUltraLow - not expected to be used for DCE 8.0 */
55{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
56/* ClocksStateLow */
57{ .display_clk_khz = 352000, .pixel_clk_khz = 330000},
58/* ClocksStateNominal */
59{ .display_clk_khz = 600000, .pixel_clk_khz = 400000 },
60/* ClocksStatePerformance */
61{ .display_clk_khz = 600000, .pixel_clk_khz = 400000 } };
62
63static const struct state_dependent_clocks dce110_max_clks_by_state[] = {
64/*ClocksStateInvalid - should not be used*/
65{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
66/*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
67{ .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
68/*ClocksStateLow*/
69{ .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
70/*ClocksStateNominal*/
71{ .display_clk_khz = 467000, .pixel_clk_khz = 400000 },
72/*ClocksStatePerformance*/
73{ .display_clk_khz = 643000, .pixel_clk_khz = 400000 } };
74
75static const struct state_dependent_clocks dce112_max_clks_by_state[] = {
76/*ClocksStateInvalid - should not be used*/
77{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
78/*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
79{ .display_clk_khz = 389189, .pixel_clk_khz = 346672 },
80/*ClocksStateLow*/
81{ .display_clk_khz = 459000, .pixel_clk_khz = 400000 },
82/*ClocksStateNominal*/
83{ .display_clk_khz = 667000, .pixel_clk_khz = 600000 },
84/*ClocksStatePerformance*/
85{ .display_clk_khz = 1132000, .pixel_clk_khz = 600000 } };
86
87static const struct state_dependent_clocks dce120_max_clks_by_state[] = {
88/*ClocksStateInvalid - should not be used*/
89{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
90/*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
91{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
92/*ClocksStateLow*/
93{ .display_clk_khz = 460000, .pixel_clk_khz = 400000 },
94/*ClocksStateNominal*/
95{ .display_clk_khz = 670000, .pixel_clk_khz = 600000 },
96/*ClocksStatePerformance*/
97{ .display_clk_khz = 1133000, .pixel_clk_khz = 600000 } };
98
99int dentist_get_divider_from_did(int did)
100{
101 if (did < DENTIST_BASE_DID_1)
102 did = DENTIST_BASE_DID_1;
103 if (did > DENTIST_MAX_DID)
104 did = DENTIST_MAX_DID;
105
106 if (did < DENTIST_BASE_DID_2) {
107 return DENTIST_DIVIDER_RANGE_1_START + DENTIST_DIVIDER_RANGE_1_STEP
108 * (did - DENTIST_BASE_DID_1);
109 } else if (did < DENTIST_BASE_DID_3) {
110 return DENTIST_DIVIDER_RANGE_2_START + DENTIST_DIVIDER_RANGE_2_STEP
111 * (did - DENTIST_BASE_DID_2);
112 } else if (did < DENTIST_BASE_DID_4) {
113 return DENTIST_DIVIDER_RANGE_3_START + DENTIST_DIVIDER_RANGE_3_STEP
114 * (did - DENTIST_BASE_DID_3);
115 } else {
116 return DENTIST_DIVIDER_RANGE_4_START + DENTIST_DIVIDER_RANGE_4_STEP
117 * (did - DENTIST_BASE_DID_4);
118 }
119}
120
121/* SW will adjust DP REF Clock average value for all purposes
122 * (DP DTO / DP Audio DTO and DP GTC)
123 if clock is spread for all cases:
124 -if SS enabled on DP Ref clock and HW de-spreading enabled with SW
125 calculations for DS_INCR/DS_MODULO (this is planned to be default case)
126 -if SS enabled on DP Ref clock and HW de-spreading enabled with HW
127 calculations (not planned to be used, but average clock should still
128 be valid)
129 -if SS enabled on DP Ref clock and HW de-spreading disabled
130 (should not be case with CIK) then SW should program all rates
131 generated according to average value (case as with previous ASICs)
132 */
133static int clk_mgr_adjust_dp_ref_freq_for_ss(struct dce_clk_mgr *clk_mgr_dce, int dp_ref_clk_khz)
134{
135 if (clk_mgr_dce->ss_on_dprefclk && clk_mgr_dce->dprefclk_ss_divider != 0) {
136 struct fixed31_32 ss_percentage = dc_fixpt_div_int(
137 arg1: dc_fixpt_from_fraction(numerator: clk_mgr_dce->dprefclk_ss_percentage,
138 denominator: clk_mgr_dce->dprefclk_ss_divider), arg2: 200);
139 struct fixed31_32 adj_dp_ref_clk_khz;
140
141 ss_percentage = dc_fixpt_sub(arg1: dc_fixpt_one, arg2: ss_percentage);
142 adj_dp_ref_clk_khz = dc_fixpt_mul_int(arg1: ss_percentage, arg2: dp_ref_clk_khz);
143 dp_ref_clk_khz = dc_fixpt_floor(arg: adj_dp_ref_clk_khz);
144 }
145 return dp_ref_clk_khz;
146}
147
148static int dce_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr)
149{
150 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
151 int dprefclk_wdivider;
152 int dprefclk_src_sel;
153 int dp_ref_clk_khz = 600000;
154 int target_div;
155
156 /* ASSERT DP Reference Clock source is from DFS*/
157 REG_GET(DPREFCLK_CNTL, DPREFCLK_SRC_SEL, &dprefclk_src_sel);
158 ASSERT(dprefclk_src_sel == 0);
159
160 /* Read the mmDENTIST_DISPCLK_CNTL to get the currently
161 * programmed DID DENTIST_DPREFCLK_WDIVIDER*/
162 REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPREFCLK_WDIVIDER, &dprefclk_wdivider);
163
164 /* Convert DENTIST_DPREFCLK_WDIVIDERto actual divider*/
165 target_div = dentist_get_divider_from_did(did: dprefclk_wdivider);
166
167 /* Calculate the current DFS clock, in kHz.*/
168 dp_ref_clk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
169 * clk_mgr_dce->dentist_vco_freq_khz) / target_div;
170
171 return clk_mgr_adjust_dp_ref_freq_for_ss(clk_mgr_dce, dp_ref_clk_khz);
172}
173
174int dce12_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr)
175{
176 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
177
178 return clk_mgr_adjust_dp_ref_freq_for_ss(clk_mgr_dce, dp_ref_clk_khz: clk_mgr_dce->dprefclk_khz);
179}
180
181/* unit: in_khz before mode set, get pixel clock from context. ASIC register
182 * may not be programmed yet
183 */
184static uint32_t get_max_pixel_clock_for_all_paths(struct dc_state *context)
185{
186 uint32_t max_pix_clk = 0;
187 int i;
188
189 for (i = 0; i < MAX_PIPES; i++) {
190 struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
191
192 if (pipe_ctx->stream == NULL)
193 continue;
194
195 /* do not check under lay */
196 if (pipe_ctx->top_pipe)
197 continue;
198
199 if (pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10 > max_pix_clk)
200 max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10;
201
202 /* raise clock state for HBR3/2 if required. Confirmed with HW DCE/DPCS
203 * logic for HBR3 still needs Nominal (0.8V) on VDDC rail
204 */
205 if (dc_is_dp_signal(signal: pipe_ctx->stream->signal) &&
206 pipe_ctx->stream_res.pix_clk_params.requested_sym_clk > max_pix_clk)
207 max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_sym_clk;
208 }
209
210 return max_pix_clk;
211}
212
213static enum dm_pp_clocks_state dce_get_required_clocks_state(
214 struct clk_mgr *clk_mgr,
215 struct dc_state *context)
216{
217 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
218 int i;
219 enum dm_pp_clocks_state low_req_clk;
220 int max_pix_clk = get_max_pixel_clock_for_all_paths(context);
221
222 /* Iterate from highest supported to lowest valid state, and update
223 * lowest RequiredState with the lowest state that satisfies
224 * all required clocks
225 */
226 for (i = clk_mgr_dce->max_clks_state; i >= DM_PP_CLOCKS_STATE_ULTRA_LOW; i--)
227 if (context->bw_ctx.bw.dce.dispclk_khz >
228 clk_mgr_dce->max_clks_by_state[i].display_clk_khz
229 || max_pix_clk >
230 clk_mgr_dce->max_clks_by_state[i].pixel_clk_khz)
231 break;
232
233 low_req_clk = i + 1;
234 if (low_req_clk > clk_mgr_dce->max_clks_state) {
235 /* set max clock state for high phyclock, invalid on exceeding display clock */
236 if (clk_mgr_dce->max_clks_by_state[clk_mgr_dce->max_clks_state].display_clk_khz
237 < context->bw_ctx.bw.dce.dispclk_khz)
238 low_req_clk = DM_PP_CLOCKS_STATE_INVALID;
239 else
240 low_req_clk = clk_mgr_dce->max_clks_state;
241 }
242
243 return low_req_clk;
244}
245
246static int dce_set_clock(
247 struct clk_mgr *clk_mgr,
248 int requested_clk_khz)
249{
250 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
251 struct bp_pixel_clock_parameters pxl_clk_params = { 0 };
252 struct dc_bios *bp = clk_mgr->ctx->dc_bios;
253 int actual_clock = requested_clk_khz;
254 struct dmcu *dmcu = clk_mgr_dce->base.ctx->dc->res_pool->dmcu;
255
256 /* Make sure requested clock isn't lower than minimum threshold*/
257 if (requested_clk_khz > 0)
258 requested_clk_khz = max(requested_clk_khz,
259 clk_mgr_dce->dentist_vco_freq_khz / 64);
260
261 /* Prepare to program display clock*/
262 pxl_clk_params.target_pixel_clock_100hz = requested_clk_khz * 10;
263 pxl_clk_params.pll_id = CLOCK_SOURCE_ID_DFS;
264
265 if (clk_mgr_dce->dfs_bypass_active)
266 pxl_clk_params.flags.SET_DISPCLK_DFS_BYPASS = true;
267
268 bp->funcs->program_display_engine_pll(bp, &pxl_clk_params);
269
270 if (clk_mgr_dce->dfs_bypass_active) {
271 /* Cache the fixed display clock*/
272 clk_mgr_dce->dfs_bypass_disp_clk =
273 pxl_clk_params.dfs_bypass_display_clock;
274 actual_clock = pxl_clk_params.dfs_bypass_display_clock;
275 }
276
277 /* from power down, we need mark the clock state as ClocksStateNominal
278 * from HWReset, so when resume we will call pplib voltage regulator.*/
279 if (requested_clk_khz == 0)
280 clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
281
282 if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu))
283 dmcu->funcs->set_psr_wait_loop(dmcu, actual_clock / 1000 / 7);
284
285 return actual_clock;
286}
287
288int dce112_set_clock(struct clk_mgr *clk_mgr, int requested_clk_khz)
289{
290 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
291 struct bp_set_dce_clock_parameters dce_clk_params;
292 struct dc_bios *bp = clk_mgr->ctx->dc_bios;
293 struct dc *core_dc = clk_mgr->ctx->dc;
294 struct dmcu *dmcu = core_dc->res_pool->dmcu;
295 int actual_clock = requested_clk_khz;
296 /* Prepare to program display clock*/
297 memset(&dce_clk_params, 0, sizeof(dce_clk_params));
298
299 /* Make sure requested clock isn't lower than minimum threshold*/
300 if (requested_clk_khz > 0)
301 requested_clk_khz = max(requested_clk_khz,
302 clk_mgr_dce->dentist_vco_freq_khz / 62);
303
304 dce_clk_params.target_clock_frequency = requested_clk_khz;
305 dce_clk_params.pll_id = CLOCK_SOURCE_ID_DFS;
306 dce_clk_params.clock_type = DCECLOCK_TYPE_DISPLAY_CLOCK;
307
308 bp->funcs->set_dce_clock(bp, &dce_clk_params);
309 actual_clock = dce_clk_params.target_clock_frequency;
310
311 /* from power down, we need mark the clock state as ClocksStateNominal
312 * from HWReset, so when resume we will call pplib voltage regulator.*/
313 if (requested_clk_khz == 0)
314 clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
315
316 /*Program DP ref Clock*/
317 /*VBIOS will determine DPREFCLK frequency, so we don't set it*/
318 dce_clk_params.target_clock_frequency = 0;
319 dce_clk_params.clock_type = DCECLOCK_TYPE_DPREFCLK;
320
321 if (!((clk_mgr->ctx->asic_id.chip_family == FAMILY_AI) &&
322 ASICREV_IS_VEGA20_P(clk_mgr->ctx->asic_id.hw_internal_rev)))
323 dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK =
324 (dce_clk_params.pll_id ==
325 CLOCK_SOURCE_COMBO_DISPLAY_PLL0);
326 else
327 dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK = false;
328
329 bp->funcs->set_dce_clock(bp, &dce_clk_params);
330
331 if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment)) {
332 if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) {
333 if (clk_mgr_dce->dfs_bypass_disp_clk != actual_clock)
334 dmcu->funcs->set_psr_wait_loop(dmcu,
335 actual_clock / 1000 / 7);
336 }
337 }
338
339 clk_mgr_dce->dfs_bypass_disp_clk = actual_clock;
340 return actual_clock;
341}
342
343static void dce_clock_read_integrated_info(struct dce_clk_mgr *clk_mgr_dce)
344{
345 struct dc_debug_options *debug = &clk_mgr_dce->base.ctx->dc->debug;
346 struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
347 struct integrated_info info = { { { 0 } } };
348 struct dc_firmware_info fw_info = { { 0 } };
349 int i;
350
351 if (bp->integrated_info)
352 info = *bp->integrated_info;
353
354 clk_mgr_dce->dentist_vco_freq_khz = info.dentist_vco_freq;
355 if (clk_mgr_dce->dentist_vco_freq_khz == 0) {
356 bp->funcs->get_firmware_info(bp, &fw_info);
357 clk_mgr_dce->dentist_vco_freq_khz =
358 fw_info.smu_gpu_pll_output_freq;
359 if (clk_mgr_dce->dentist_vco_freq_khz == 0)
360 clk_mgr_dce->dentist_vco_freq_khz = 3600000;
361 }
362
363 /*update the maximum display clock for each power state*/
364 for (i = 0; i < NUMBER_OF_DISP_CLK_VOLTAGE; ++i) {
365 enum dm_pp_clocks_state clk_state = DM_PP_CLOCKS_STATE_INVALID;
366
367 switch (i) {
368 case 0:
369 clk_state = DM_PP_CLOCKS_STATE_ULTRA_LOW;
370 break;
371
372 case 1:
373 clk_state = DM_PP_CLOCKS_STATE_LOW;
374 break;
375
376 case 2:
377 clk_state = DM_PP_CLOCKS_STATE_NOMINAL;
378 break;
379
380 case 3:
381 clk_state = DM_PP_CLOCKS_STATE_PERFORMANCE;
382 break;
383
384 default:
385 clk_state = DM_PP_CLOCKS_STATE_INVALID;
386 break;
387 }
388
389 /*Do not allow bad VBIOS/SBIOS to override with invalid values,
390 * check for > 100MHz*/
391 if (info.disp_clk_voltage[i].max_supported_clk >= 100000)
392 clk_mgr_dce->max_clks_by_state[clk_state].display_clk_khz =
393 info.disp_clk_voltage[i].max_supported_clk;
394 }
395
396 if (!debug->disable_dfs_bypass && bp->integrated_info)
397 if (bp->integrated_info->gpu_cap_info & DFS_BYPASS_ENABLE)
398 clk_mgr_dce->dfs_bypass_enabled = true;
399}
400
401void dce_clock_read_ss_info(struct dce_clk_mgr *clk_mgr_dce)
402{
403 struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
404 int ss_info_num = bp->funcs->get_ss_entry_number(
405 bp, AS_SIGNAL_TYPE_GPU_PLL);
406
407 if (ss_info_num) {
408 struct spread_spectrum_info info = { { 0 } };
409 enum bp_result result = bp->funcs->get_spread_spectrum_info(
410 bp, AS_SIGNAL_TYPE_GPU_PLL, 0, &info);
411
412 /* Based on VBIOS, VBIOS will keep entry for GPU PLL SS
413 * even if SS not enabled and in that case
414 * SSInfo.spreadSpectrumPercentage !=0 would be sign
415 * that SS is enabled
416 */
417 if (result == BP_RESULT_OK &&
418 info.spread_spectrum_percentage != 0) {
419 clk_mgr_dce->ss_on_dprefclk = true;
420 clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider;
421
422 if (info.type.CENTER_MODE == 0) {
423 /* TODO: Currently for DP Reference clock we
424 * need only SS percentage for
425 * downspread */
426 clk_mgr_dce->dprefclk_ss_percentage =
427 info.spread_spectrum_percentage;
428 }
429
430 return;
431 }
432
433 result = bp->funcs->get_spread_spectrum_info(
434 bp, AS_SIGNAL_TYPE_DISPLAY_PORT, 0, &info);
435
436 /* Based on VBIOS, VBIOS will keep entry for DPREFCLK SS
437 * even if SS not enabled and in that case
438 * SSInfo.spreadSpectrumPercentage !=0 would be sign
439 * that SS is enabled
440 */
441 if (result == BP_RESULT_OK &&
442 info.spread_spectrum_percentage != 0) {
443 clk_mgr_dce->ss_on_dprefclk = true;
444 clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider;
445
446 if (info.type.CENTER_MODE == 0) {
447 /* Currently for DP Reference clock we
448 * need only SS percentage for
449 * downspread */
450 clk_mgr_dce->dprefclk_ss_percentage =
451 info.spread_spectrum_percentage;
452 }
453 if (clk_mgr_dce->base.ctx->dc->debug.ignore_dpref_ss)
454 clk_mgr_dce->dprefclk_ss_percentage = 0;
455 }
456 }
457}
458
459/**
460 * dce121_clock_patch_xgmi_ss_info() - Save XGMI spread spectrum info
461 * @clk_mgr: clock manager base structure
462 *
463 * Reads from VBIOS the XGMI spread spectrum info and saves it within
464 * the dce clock manager. This operation will overwrite the existing dprefclk
465 * SS values if the vBIOS query succeeds. Otherwise, it does nothing. It also
466 * sets the ->xgmi_enabled flag.
467 */
468void dce121_clock_patch_xgmi_ss_info(struct clk_mgr *clk_mgr)
469{
470 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
471 enum bp_result result;
472 struct spread_spectrum_info info = { { 0 } };
473 struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
474
475 clk_mgr_dce->xgmi_enabled = false;
476
477 result = bp->funcs->get_spread_spectrum_info(bp, AS_SIGNAL_TYPE_XGMI,
478 0, &info);
479 if (result == BP_RESULT_OK && info.spread_spectrum_percentage != 0) {
480 clk_mgr_dce->xgmi_enabled = true;
481 clk_mgr_dce->ss_on_dprefclk = true;
482 clk_mgr_dce->dprefclk_ss_divider =
483 info.spread_percentage_divider;
484
485 if (info.type.CENTER_MODE == 0) {
486 /* Currently for DP Reference clock we
487 * need only SS percentage for
488 * downspread */
489 clk_mgr_dce->dprefclk_ss_percentage =
490 info.spread_spectrum_percentage;
491 }
492 }
493}
494
495void dce110_fill_display_configs(
496 const struct dc_state *context,
497 struct dm_pp_display_configuration *pp_display_cfg)
498{
499 int j;
500 int num_cfgs = 0;
501
502 for (j = 0; j < context->stream_count; j++) {
503 int k;
504
505 const struct dc_stream_state *stream = context->streams[j];
506 struct dm_pp_single_disp_config *cfg =
507 &pp_display_cfg->disp_configs[num_cfgs];
508 const struct pipe_ctx *pipe_ctx = NULL;
509
510 for (k = 0; k < MAX_PIPES; k++)
511 if (stream == context->res_ctx.pipe_ctx[k].stream) {
512 pipe_ctx = &context->res_ctx.pipe_ctx[k];
513 break;
514 }
515
516 ASSERT(pipe_ctx != NULL);
517
518 /* only notify active stream */
519 if (stream->dpms_off)
520 continue;
521
522 num_cfgs++;
523 cfg->signal = pipe_ctx->stream->signal;
524 cfg->pipe_idx = pipe_ctx->stream_res.tg->inst;
525 cfg->src_height = stream->src.height;
526 cfg->src_width = stream->src.width;
527 cfg->ddi_channel_mapping =
528 stream->link->ddi_channel_mapping.raw;
529 cfg->transmitter =
530 stream->link->link_enc->transmitter;
531 cfg->link_settings.lane_count =
532 stream->link->cur_link_settings.lane_count;
533 cfg->link_settings.link_rate =
534 stream->link->cur_link_settings.link_rate;
535 cfg->link_settings.link_spread =
536 stream->link->cur_link_settings.link_spread;
537 cfg->sym_clock = stream->phy_pix_clk;
538 /* Round v_refresh*/
539 cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
540 cfg->v_refresh /= stream->timing.h_total;
541 cfg->v_refresh = (cfg->v_refresh + stream->timing.v_total / 2)
542 / stream->timing.v_total;
543 }
544
545 pp_display_cfg->display_count = num_cfgs;
546}
547
548static uint32_t dce110_get_min_vblank_time_us(const struct dc_state *context)
549{
550 uint8_t j;
551 uint32_t min_vertical_blank_time = -1;
552
553 for (j = 0; j < context->stream_count; j++) {
554 struct dc_stream_state *stream = context->streams[j];
555 uint32_t vertical_blank_in_pixels = 0;
556 uint32_t vertical_blank_time = 0;
557
558 vertical_blank_in_pixels = stream->timing.h_total *
559 (stream->timing.v_total
560 - stream->timing.v_addressable);
561
562 vertical_blank_time = vertical_blank_in_pixels
563 * 10000 / stream->timing.pix_clk_100hz;
564
565 if (min_vertical_blank_time > vertical_blank_time)
566 min_vertical_blank_time = vertical_blank_time;
567 }
568
569 return min_vertical_blank_time;
570}
571
572static int determine_sclk_from_bounding_box(
573 const struct dc *dc,
574 int required_sclk)
575{
576 int i;
577
578 /*
579 * Some asics do not give us sclk levels, so we just report the actual
580 * required sclk
581 */
582 if (dc->sclk_lvls.num_levels == 0)
583 return required_sclk;
584
585 for (i = 0; i < dc->sclk_lvls.num_levels; i++) {
586 if (dc->sclk_lvls.clocks_in_khz[i] >= required_sclk)
587 return dc->sclk_lvls.clocks_in_khz[i];
588 }
589 /*
590 * even maximum level could not satisfy requirement, this
591 * is unexpected at this stage, should have been caught at
592 * validation time
593 */
594 ASSERT(0);
595 return dc->sclk_lvls.clocks_in_khz[dc->sclk_lvls.num_levels - 1];
596}
597
598static void dce_pplib_apply_display_requirements(
599 struct dc *dc,
600 struct dc_state *context)
601{
602 struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
603
604 pp_display_cfg->avail_mclk_switch_time_us = dce110_get_min_vblank_time_us(context);
605
606 dce110_fill_display_configs(context, pp_display_cfg);
607
608 if (memcmp(p: &dc->current_state->pp_display_cfg, q: pp_display_cfg, size: sizeof(*pp_display_cfg)) != 0)
609 dm_pp_apply_display_requirements(ctx: dc->ctx, pp_display_cfg);
610}
611
612static void dce11_pplib_apply_display_requirements(
613 struct dc *dc,
614 struct dc_state *context)
615{
616 struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
617
618 pp_display_cfg->all_displays_in_sync =
619 context->bw_ctx.bw.dce.all_displays_in_sync;
620 pp_display_cfg->nb_pstate_switch_disable =
621 context->bw_ctx.bw.dce.nbp_state_change_enable == false;
622 pp_display_cfg->cpu_cc6_disable =
623 context->bw_ctx.bw.dce.cpuc_state_change_enable == false;
624 pp_display_cfg->cpu_pstate_disable =
625 context->bw_ctx.bw.dce.cpup_state_change_enable == false;
626 pp_display_cfg->cpu_pstate_separation_time =
627 context->bw_ctx.bw.dce.blackout_recovery_time_us;
628
629 pp_display_cfg->min_memory_clock_khz = context->bw_ctx.bw.dce.yclk_khz
630 / MEMORY_TYPE_MULTIPLIER_CZ;
631
632 pp_display_cfg->min_engine_clock_khz = determine_sclk_from_bounding_box(
633 dc,
634 required_sclk: context->bw_ctx.bw.dce.sclk_khz);
635
636 /*
637 * As workaround for >4x4K lightup set dcfclock to min_engine_clock value.
638 * This is not required for less than 5 displays,
639 * thus don't request decfclk in dc to avoid impact
640 * on power saving.
641 *
642 */
643 pp_display_cfg->min_dcfclock_khz = (context->stream_count > 4) ?
644 pp_display_cfg->min_engine_clock_khz : 0;
645
646 pp_display_cfg->min_engine_clock_deep_sleep_khz
647 = context->bw_ctx.bw.dce.sclk_deep_sleep_khz;
648
649 pp_display_cfg->avail_mclk_switch_time_us =
650 dce110_get_min_vblank_time_us(context);
651 /* TODO: dce11.2*/
652 pp_display_cfg->avail_mclk_switch_time_in_disp_active_us = 0;
653
654 pp_display_cfg->disp_clk_khz = dc->res_pool->clk_mgr->clks.dispclk_khz;
655
656 dce110_fill_display_configs(context, pp_display_cfg);
657
658 /* TODO: is this still applicable?*/
659 if (pp_display_cfg->display_count == 1) {
660 const struct dc_crtc_timing *timing =
661 &context->streams[0]->timing;
662
663 pp_display_cfg->crtc_index =
664 pp_display_cfg->disp_configs[0].pipe_idx;
665 pp_display_cfg->line_time_in_us = timing->h_total * 10000 / timing->pix_clk_100hz;
666 }
667
668 if (memcmp(p: &dc->current_state->pp_display_cfg, q: pp_display_cfg, size: sizeof(*pp_display_cfg)) != 0)
669 dm_pp_apply_display_requirements(ctx: dc->ctx, pp_display_cfg);
670}
671
672static void dce_update_clocks(struct clk_mgr *clk_mgr,
673 struct dc_state *context,
674 bool safe_to_lower)
675{
676 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
677 struct dm_pp_power_level_change_request level_change_req;
678 int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
679
680 /*TODO: W/A for dal3 linux, investigate why this works */
681 if (!clk_mgr_dce->dfs_bypass_active)
682 patched_disp_clk = patched_disp_clk * 115 / 100;
683
684 level_change_req.power_level = dce_get_required_clocks_state(clk_mgr, context);
685 /* get max clock state from PPLIB */
686 if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
687 || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
688 if (dm_pp_apply_power_level_change_request(ctx: clk_mgr->ctx, level_change_req: &level_change_req))
689 clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
690 }
691
692 if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
693 patched_disp_clk = dce_set_clock(clk_mgr, requested_clk_khz: patched_disp_clk);
694 clk_mgr->clks.dispclk_khz = patched_disp_clk;
695 }
696 dce_pplib_apply_display_requirements(dc: clk_mgr->ctx->dc, context);
697}
698
699static void dce11_update_clocks(struct clk_mgr *clk_mgr,
700 struct dc_state *context,
701 bool safe_to_lower)
702{
703 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
704 struct dm_pp_power_level_change_request level_change_req;
705 int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
706
707 /*TODO: W/A for dal3 linux, investigate why this works */
708 if (!clk_mgr_dce->dfs_bypass_active)
709 patched_disp_clk = patched_disp_clk * 115 / 100;
710
711 level_change_req.power_level = dce_get_required_clocks_state(clk_mgr, context);
712 /* get max clock state from PPLIB */
713 if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
714 || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
715 if (dm_pp_apply_power_level_change_request(ctx: clk_mgr->ctx, level_change_req: &level_change_req))
716 clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
717 }
718
719 if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
720 context->bw_ctx.bw.dce.dispclk_khz = dce_set_clock(clk_mgr, requested_clk_khz: patched_disp_clk);
721 clk_mgr->clks.dispclk_khz = patched_disp_clk;
722 }
723 dce11_pplib_apply_display_requirements(dc: clk_mgr->ctx->dc, context);
724}
725
726static void dce112_update_clocks(struct clk_mgr *clk_mgr,
727 struct dc_state *context,
728 bool safe_to_lower)
729{
730 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
731 struct dm_pp_power_level_change_request level_change_req;
732 int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
733
734 /*TODO: W/A for dal3 linux, investigate why this works */
735 if (!clk_mgr_dce->dfs_bypass_active)
736 patched_disp_clk = patched_disp_clk * 115 / 100;
737
738 level_change_req.power_level = dce_get_required_clocks_state(clk_mgr, context);
739 /* get max clock state from PPLIB */
740 if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
741 || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
742 if (dm_pp_apply_power_level_change_request(ctx: clk_mgr->ctx, level_change_req: &level_change_req))
743 clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
744 }
745
746 if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
747 patched_disp_clk = dce112_set_clock(clk_mgr, requested_clk_khz: patched_disp_clk);
748 clk_mgr->clks.dispclk_khz = patched_disp_clk;
749 }
750 dce11_pplib_apply_display_requirements(dc: clk_mgr->ctx->dc, context);
751}
752
753static void dce12_update_clocks(struct clk_mgr *clk_mgr,
754 struct dc_state *context,
755 bool safe_to_lower)
756{
757 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
758 struct dm_pp_clock_for_voltage_req clock_voltage_req = {0};
759 int max_pix_clk = get_max_pixel_clock_for_all_paths(context);
760 int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
761
762 /*TODO: W/A for dal3 linux, investigate why this works */
763 if (!clk_mgr_dce->dfs_bypass_active)
764 patched_disp_clk = patched_disp_clk * 115 / 100;
765
766 if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
767 clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DISPLAY_CLK;
768 /*
769 * When xGMI is enabled, the display clk needs to be adjusted
770 * with the WAFL link's SS percentage.
771 */
772 if (clk_mgr_dce->xgmi_enabled)
773 patched_disp_clk = clk_mgr_adjust_dp_ref_freq_for_ss(
774 clk_mgr_dce, dp_ref_clk_khz: patched_disp_clk);
775 clock_voltage_req.clocks_in_khz = patched_disp_clk;
776 clk_mgr->clks.dispclk_khz = dce112_set_clock(clk_mgr, requested_clk_khz: patched_disp_clk);
777
778 dm_pp_apply_clock_for_voltage_request(ctx: clk_mgr->ctx, clock_for_voltage_req: &clock_voltage_req);
779 }
780
781 if (should_set_clock(safe_to_lower, max_pix_clk, clk_mgr->clks.phyclk_khz)) {
782 clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DISPLAYPHYCLK;
783 clock_voltage_req.clocks_in_khz = max_pix_clk;
784 clk_mgr->clks.phyclk_khz = max_pix_clk;
785
786 dm_pp_apply_clock_for_voltage_request(ctx: clk_mgr->ctx, clock_for_voltage_req: &clock_voltage_req);
787 }
788 dce11_pplib_apply_display_requirements(dc: clk_mgr->ctx->dc, context);
789}
790
791static const struct clk_mgr_funcs dce120_funcs = {
792 .get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
793 .update_clocks = dce12_update_clocks
794};
795
796static const struct clk_mgr_funcs dce112_funcs = {
797 .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
798 .update_clocks = dce112_update_clocks
799};
800
801static const struct clk_mgr_funcs dce110_funcs = {
802 .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
803 .update_clocks = dce11_update_clocks,
804};
805
806static const struct clk_mgr_funcs dce_funcs = {
807 .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
808 .update_clocks = dce_update_clocks
809};
810
811static void dce_clk_mgr_construct(
812 struct dce_clk_mgr *clk_mgr_dce,
813 struct dc_context *ctx,
814 const struct clk_mgr_registers *regs,
815 const struct clk_mgr_shift *clk_shift,
816 const struct clk_mgr_mask *clk_mask)
817{
818 struct clk_mgr *base = &clk_mgr_dce->base;
819 struct dm_pp_static_clock_info static_clk_info = {0};
820
821 base->ctx = ctx;
822 base->funcs = &dce_funcs;
823
824 clk_mgr_dce->regs = regs;
825 clk_mgr_dce->clk_mgr_shift = clk_shift;
826 clk_mgr_dce->clk_mgr_mask = clk_mask;
827
828 clk_mgr_dce->dfs_bypass_disp_clk = 0;
829
830 clk_mgr_dce->dprefclk_ss_percentage = 0;
831 clk_mgr_dce->dprefclk_ss_divider = 1000;
832 clk_mgr_dce->ss_on_dprefclk = false;
833
834
835 if (dm_pp_get_static_clocks(ctx, static_clk_info: &static_clk_info))
836 clk_mgr_dce->max_clks_state = static_clk_info.max_clocks_state;
837 else
838 clk_mgr_dce->max_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
839 clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_INVALID;
840
841 dce_clock_read_integrated_info(clk_mgr_dce);
842 dce_clock_read_ss_info(clk_mgr_dce);
843}
844
845struct clk_mgr *dce_clk_mgr_create(
846 struct dc_context *ctx,
847 const struct clk_mgr_registers *regs,
848 const struct clk_mgr_shift *clk_shift,
849 const struct clk_mgr_mask *clk_mask)
850{
851 struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
852
853 if (clk_mgr_dce == NULL) {
854 BREAK_TO_DEBUGGER();
855 return NULL;
856 }
857
858 memcpy(clk_mgr_dce->max_clks_by_state,
859 dce80_max_clks_by_state,
860 sizeof(dce80_max_clks_by_state));
861
862 dce_clk_mgr_construct(
863 clk_mgr_dce, ctx, regs, clk_shift, clk_mask);
864
865 return &clk_mgr_dce->base;
866}
867
868struct clk_mgr *dce110_clk_mgr_create(
869 struct dc_context *ctx,
870 const struct clk_mgr_registers *regs,
871 const struct clk_mgr_shift *clk_shift,
872 const struct clk_mgr_mask *clk_mask)
873{
874 struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
875
876 if (clk_mgr_dce == NULL) {
877 BREAK_TO_DEBUGGER();
878 return NULL;
879 }
880
881 memcpy(clk_mgr_dce->max_clks_by_state,
882 dce110_max_clks_by_state,
883 sizeof(dce110_max_clks_by_state));
884
885 dce_clk_mgr_construct(
886 clk_mgr_dce, ctx, regs, clk_shift, clk_mask);
887
888 clk_mgr_dce->base.funcs = &dce110_funcs;
889
890 return &clk_mgr_dce->base;
891}
892
893struct clk_mgr *dce112_clk_mgr_create(
894 struct dc_context *ctx,
895 const struct clk_mgr_registers *regs,
896 const struct clk_mgr_shift *clk_shift,
897 const struct clk_mgr_mask *clk_mask)
898{
899 struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
900
901 if (clk_mgr_dce == NULL) {
902 BREAK_TO_DEBUGGER();
903 return NULL;
904 }
905
906 memcpy(clk_mgr_dce->max_clks_by_state,
907 dce112_max_clks_by_state,
908 sizeof(dce112_max_clks_by_state));
909
910 dce_clk_mgr_construct(
911 clk_mgr_dce, ctx, regs, clk_shift, clk_mask);
912
913 clk_mgr_dce->base.funcs = &dce112_funcs;
914
915 return &clk_mgr_dce->base;
916}
917
918struct clk_mgr *dce120_clk_mgr_create(struct dc_context *ctx)
919{
920 struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
921
922 if (clk_mgr_dce == NULL) {
923 BREAK_TO_DEBUGGER();
924 return NULL;
925 }
926
927 memcpy(clk_mgr_dce->max_clks_by_state,
928 dce120_max_clks_by_state,
929 sizeof(dce120_max_clks_by_state));
930
931 dce_clk_mgr_construct(
932 clk_mgr_dce, ctx, NULL, NULL, NULL);
933
934 clk_mgr_dce->dprefclk_khz = 600000;
935 clk_mgr_dce->base.funcs = &dce120_funcs;
936
937 return &clk_mgr_dce->base;
938}
939
940struct clk_mgr *dce121_clk_mgr_create(struct dc_context *ctx)
941{
942 struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce),
943 GFP_KERNEL);
944
945 if (clk_mgr_dce == NULL) {
946 BREAK_TO_DEBUGGER();
947 return NULL;
948 }
949
950 memcpy(clk_mgr_dce->max_clks_by_state, dce120_max_clks_by_state,
951 sizeof(dce120_max_clks_by_state));
952
953 dce_clk_mgr_construct(clk_mgr_dce, ctx, NULL, NULL, NULL);
954
955 clk_mgr_dce->dprefclk_khz = 625000;
956 clk_mgr_dce->base.funcs = &dce120_funcs;
957
958 return &clk_mgr_dce->base;
959}
960
961void dce_clk_mgr_destroy(struct clk_mgr **clk_mgr)
962{
963 struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(*clk_mgr);
964
965 kfree(objp: clk_mgr_dce);
966 *clk_mgr = NULL;
967}
968

source code of linux/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c